The Sims 2: Castaway

Cheat Gnome:Quickly press R1, L1, Down, Square,
R2 while on a lot to spawn the Cheat Gnome. It appears
at different locations, depending on which island you are on,
and must be found. The following codes can now be enabled, which
will unlock the corresponding options on the Cheat Gnome after
it is found.